Table 2 Subgroup analysis of 18 included studies in this systematic review and meta-analysis considering study design, sample size, and study settings
Variables used for subgroup analysis | Â | Random effects RR with (95%CI) |
|---|---|---|
Study design | Cross sectional | 0.64 (0.46, 0.88) |
Case-control | 0.61 (0.40, 0.94) | |
Cohort | 0.72 (0.48, 1.07) | |
Community trial | 0.89 (0.46, 1.72) | |
Sample size | < 1000 | 0.7 (0.47, 1.05) |
1000–10,000 | 0.67 (0.55, 0.82) | |
> 10,000 | 0.61 (0.41, 0.9) | |
Study settings | SSA | 0.59 (0.46, 0.76) |
Asia | 0.78 (0.58, 1.06) | |
South America | 0.93 (0.68, 1.25) |